s390/eadm_sch: add support for irq statistics

Add support for EADM interrupt statistics in /proc/interrupts.

Signed-off-by: Sebastian Ott <[e-mail]>
Signed-off-by: Martin Schwidefsky <[e-mail]>

arch/s390/include/asm/irq.h

···
 	IOINT_CLW,
 	IOINT_CTC,
 	IOINT_APB,
+	IOINT_ADM,
 	IOINT_CSC,
 	NMI_NMI,
 	NR_IRQS,

arch/s390/kernel/irq.c

···
 	{.name = "CLW", .desc = "[I/O] CLAW" },
 	{.name = "CTC", .desc = "[I/O] CTC" },
 	{.name = "APB", .desc = "[I/O] AP Bus" },
+	{.name = "ADM", .desc = "[I/O] EADM Subchannel" },
 	{.name = "CSC", .desc = "[I/O] CHSC Subchannel" },
 	{.name = "NMI", .desc = "[NMI] Machine Check" },
 };

drivers/s390/cio/eadm_sch.c

···
  * Author(s): Sebastian Ott <[e-mail]>
  */
 
+#include <linux/kernel_stat.h>
 #include <linux/workqueue.h>
 #include <linux/spinlock.h>
 #include <linux/device.h>
···
 
 	EADM_LOG(6, "irq");
 	EADM_LOG_HEX(6, irb, sizeof(*irb));
+
+	kstat_cpu(smp_processor_id()).irqs[IOINT_ADM]++;
 
 	if ((scsw->stctl & (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))
 	    && scsw->eswf == 1 && irb->esw.eadm.erw.r)